Quick Guide: Timeline Interactions


Timeline interactions enrich students’ understanding of events within specific historical contexts and reinforce important dates. Items on each timeline are uniquely spaced according to the gaps between events; this aids in understanding time elapsed between both distant and adjacent events.


  • Timeline interactions are exploratory, ungraded activities.
  • Individual timelines may begin at up to 200,000 B.C.
  • It is possible to augment timelines with select web-hosted images or videos.
  • Include dates (and eras) as appropriate for the content.

Reminder: Working with Images and Videos

Before developing any content related to images or videos, please see Active Learning Image Guide and/or Guidelines for Selecting YouTube and Vimeo Videos.

Note: Images related to specific dates must also be available online at Wikimedia Commons or Flickr. Record these resources in the relevant image log and/or video log and submit the log(s) to your Active Learning Project Editor.

Accessibility Requirement

In consideration of meeting accessibility requirements, any instructional image used in an activity must be accompanied by alternative text (alt text). Alt text is a term used to describe text that is read by a screen reader in place of an image. When a screen reader encounters an image within an activity, it will skip over it unless there is alt text provided to read in its place. This renders the activity incomprehensible.

See Quick Guide: Writing Alt Text for further guidance.